diff --git a/pyproject.toml b/pyproject.toml
index 4e3b0f6..9ac0eed 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,6 +28,7 @@ dependencies = [
 dev = [
     "pytest>=7.0.0",
     "pytest-cov>=4.0.0",
+    "mypy>=1.0.0",
 ]
 
 [project.scripts]